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Popkin, Richard Henry. The history of scepticism : from Savonarola to Bayle, Popkin, Richard Henry, Rev. and expanded, Oxford: Oxford University Press, 2003. ISBN 978-0195355390. OCLC65192690.
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Popkin, Richard Henry. The history of scepticism : from Savonarola to Bayle, Popkin, Richard Henry, Rev. and expanded, Oxford: Oxford University Press, 2003. ISBN 978-0195355390. OCLC65192690.